Aerial sickktal light



H. L. M. L BENABD- AERIAL SIGNAL LIGHT.

APPLICATION FILED MHZ-4,1921- Patented Apr. 18, 1922.

' do hereby declare the following to be a full,

' nemrwet MARIE JOSEPH me ge, or 1 3 Nd 3' AERIAL SIGNAL LIGHT.

I Specification of Letters Extent; i 11922 I Original application'filedMay 23,1'1919, Serial No. 299,104. Divided and this application'filed lliay 24; i I 1921. Serial N0.'472,260. 1

To all whom it/moy concern: v r

Be it known that I, 'I'IENRI; LUGLIEN. h/IARIE JOSEPH BENARD, a citizen of the Republic of'France, residing atParis, France, have invented certain new useful Improvements in Aerial Signal Lights; and I clear, and exact description of the invention, such-as will enable others skilled-in the art to which it zip-pertains to make anduse thesame.

The present invention relates to "search lights, particularly adapted for use in aerial navigation, and constitutes a division of application, Serial No. 299,104;,-filed May 23, 1919, and issued as PatentNo; 1,384,659.

An object of this invention is to provide a search light by means of which signallights may be produced continuously and without interruption in a vertical plane extending from the horizon to the zenith of the search light and wherein the greatest intensity of the light is projected horizontally and owing to the condition of the air, the light, may be more readily observed from relativelyhigh altitudes such as at an alti Another object of the invention is to pro vide a'search light with an aperture or Window extending vertically in the upper part of the search light by means of which it is possible to illuminatetrom the horizon to the zenith of the search light in a continuous manner and wltha single source of light.

.Vith the foregoingand other ob jects'in view, the invention will be more fully described hereinafter, and will be more particularly pointed out in the claims appended hereto.

in the drawings, wherein like symbolsrefer to like or corresponding parts through- 1 out the several views,

Fig. l' is a vertical section taken longi tudmally through a search light constructec according to the present invention; and

Fig. 2 man end elevation ofthe same.

Referring to thedrawingthe search light,

according-to the present embodiment, coinprises-a double ended reflector A which flares toward theopposite' ends of the search lightfor emittinglight rays from opposite ends thereof. A single source of light 2, in the present instance an incandescent mantel, is

arranged at the focus of the double reflector A, and inthe opposite ends of the double re flector A are placed lenses L of suitable con- I nde ot LOOU meters,

struction which are mounted on supports M secured to the sides of the reflector A.

The lenses L, a'nd double reflector A, -are, 7

arranged so as to project the luminous rays" emitted by the' 'sour'ce of lightQinto' a very intense horizontal beam having a diameter equal to the distance" between the top and bottom Ilinesa owhich are horizontal as Each support M'is forked or bifurcated at its upper partto tit-the marginal edges of the windowE and shown attheftop of Fig liby-the'angle r v thus define the window and support the lens.

The upper parts of'the-refiector arealso slotted in register with thewind'ow' E, and it will thus be seen'that the rays emitted by dow or interval E give illumination'from the window E is of the same Width in the'lenses and in theupper part of the double reflector A so that the pencil-of lightformed by the direct light rays emitted from thesource 2 isot the same horizontal amplitude from the horizon to the zenith. As the horizontal is very small, and the window Ebeing relatlvely small, the small quant1ty of the lenses which is removed only inappreciably di-l I ininishesthe intensity of the beam of the penciL The graphic illustrations of the dia rect light rays from the source of light 2 are the-source of light passingtl' rough this winhorizontal up to the vertical line passing" through, the axis of the searchj light. 'The indicated'at Rin' the drawing and pass uninterruptedly through the windows and the slots formed. in the lenses and in the" reflectorA.-

ice

whne the -present embodiment illustrates "from one end and through the top-thereof.

the search light of double ended construe 't1on,j1t is of course understood that it may It is obvious that various changes and modifications may be made 1n the details or construction and design of the above speci; fically described enibodin entsof th s invenrile amplitudeofthe pencil given by'the lenses I tion without departing from the spirit thereof, such changes and modifications being restricted only by the scope of the following claims.

That is claimed is 1. A signal light for .use in aerial navigation comprising a source of light, lenses for projecting the beam from Said source of light, and reflectors for reflecting said beam, said lenses and reflectors having apertures therein to allow a narrow beam of direct rays to extend from the horizon to the zenith, substantially as described.

2. A signal light for use in aerial navigation comprising a reflector, a lense mounted in the reflector, a source of light arranged in the reflector at the focus of said lens, and a support carried by the reflector and engaging said lens to maintain the same in position, said lens, support and reflector having 20 registering vertical apertures therein to allow a narrow beam of direct light rays to extend from the horizon to the zenith, substantially as described.

3. In a signal light for use in aerial navigation, a double ended reflector, a lens for each end of the reflector, supports carried in the ends of the reflector and engaging said lenses for maintaining the same in position, a single source of light arranged in the reflector and at the foci of said lenses, said lenses, supports and reflector having registering vertical apertures therein to allow a nar row beam of direct rays to extend from the 1 horizon to the zenith of said source of light, 3 substantially as described.

HENRI LUGLIEN MARlE JOSEPH BENARD. 

